GHSA-9j5w-2cqc-cwj9
Magento LTS vulnerable to Stored XSS via TinyMCE WYSIWYG Editor
GHSA-9j5w-2cqc-cwj9 is a high vulnerability (CVSS 7.5) in openmage/magento-lts, published December 8, 2023. No source lists public exploit code. Fixed in openmage/magento-lts 20.2.0.
- Severity
- 7.5 HighCVSS 3.1, GitHub Advisories
- Exploit chance
- UnscoredNo EPSS score yet
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
20.2.0openmage/magento-lts +1 more
Description
From HackerOne report #1948040 by Halit AKAYDIN (hltakydn)
Impact
What kind of vulnerability is it? Who is impacted?
The TinyMCE WYSIWYG editor fails to filter scripts when rendering the HTML in specially crafted HTML tags.
Patches
Has the problem been patched? What versions should users upgrade to?
This vulnerability was fixed in version 20.2.0 by upgrading TinyMCE to a recent version in https://github.com/OpenMage/magento-lts/pull/3220
Workarounds
Is there a way for users to fix or remediate the vulnerability without upgrading?
The WYSIWYG editor features could be disabled in the configuration. Possibly some WAF appliances would filter this attack.
References
Are there any links users can visit to find out more?
The attack is simply an exploit of the "onmouseover" attribute of an img element as described on OWASP XSS Filter Evasion
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- High
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- Low
- Availability
- Low
Affected packages
| Package | Affected | Fixed |
|---|---|---|
openmage/magento-ltsPackagist | before 20.2.0 | 20.2.0 |
openmage/magento-ltsPackagist | before 20.2.0, plus listed versions 1.9.1.11.9.2.01.9.2.11.9.2.21.9.2.3 Show 45 moreShow less1.9.2.41.9.3.01.9.3.1v19.4.0v19.4.1v19.4.10v19.4.11v19.4.12v19.4.13v19.4.14v19.4.15v19.4.16v19.4.17v19.4.18v19.4.19v19.4.2v19.4.20v19.4.21v19.4.22v19.4.23v19.4.3v19.4.4v19.4.5v19.4.6v19.4.7v19.4.8v19.4.9v19.5.0v19.5.0-rc1v19.5.0-rc2v19.5.0-rc3v19.5.0-rc4v19.5.0-rc5v19.5.1v19.5.2v19.5.3v20.0.0v20.0.1v20.0.10v20.0.11v20.0.12v20.0.13v20.0.14v20.0.15v20.0.16 | 20.2.0 |
What each source reports
GitHub Advisories Score used
Magento LTS vulnerable to Stored XSS via TinyMCE WYSIWYG Editor
From HackerOne report #1948040 by Halit AKAYDIN (hltakydn)
Impact
What kind of vulnerability is it? Who is impacted?
The TinyMCE WYSIWYG editor fails to filter scripts when rendering the HTML in specially crafted HTML tags.
Patches
Has the problem been patched? What versions should users upgrade to?
This vulnerability was fixed in version 20.2.0 by upgrading TinyMCE to a recent version in https://github.com/OpenMage/magento-lts/pull/3220
Workarounds
Is there a way for users to fix or remediate the vulnerability without upgrading?
The WYSIWYG editor features could be disabled in the configuration. Possibly some WAF appliances would filter this attack.
References
Are there any links users can visit to find out more?
The attack is simply an exploit of the "onmouseover" attribute of an img element as described on OWASP XSS Filter Evasion
- Record
GHSA-9j5w-2cqc-cwj9- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:L - Weakness
- CWE-79
- Updated
- 2026-11-02
OSV
Magento LTS vulnerable to Stored XSS via TinyMCE WYSIWYG Editor
From HackerOne report #1948040 by Halit AKAYDIN (hltakydn)
Impact
What kind of vulnerability is it? Who is impacted?
The TinyMCE WYSIWYG editor fails to filter scripts when rendering the HTML in specially crafted HTML tags.
Patches
Has the problem been patched? What versions should users upgrade to?
This vulnerability was fixed in version 20.2.0 by upgrading TinyMCE to a recent version in https://github.com/OpenMage/magento-lts/pull/3220
Workarounds
Is there a way for users to fix or remediate the vulnerability without upgrading?
The WYSIWYG editor features could be disabled in the configuration. Possibly some WAF appliances would filter this attack.
References
Are there any links users can visit to find out more?
The attack is simply an exploit of the "onmouseover" attribute of an img element as described on OWASP XSS Filter Evasion
- Record
GHSA-9j5w-2cqc-cwj9- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:L - Weakness
- CWE-79
- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
References
Left out here: 20 versions. The JSON record has them.